Process of preserving tin-weighted silk.



UNITED STATES PATENT OFFICE.

ERNEST MEILI, OF HAWTHORNE, NEW JERSEY, ASSIGNOR TO WEIDMANN SILK' DYEING 60.; 0F PATERSON, NEW JERSEY, CORPORATION OF NEW JERSEY.

PROCESS OF PRESERVING TIN-WEIGHTED SILK.

No Drawing.

"0 all whomit may concern:

Be it known that I, ERNEST MnILI, a citizen of the United States,res1d1ng at Hawthorne, in the county of Passaic and,

State of New Jersey, have invented a certain new and useful Process of Preserving Tin-YVeighted Silk, of which the following is a specification.

In the weighting of silk by methodsinvolving the um of tin solutions it is found that the silk sooner or later loses its strength, which undes abltresult-is more especially likely to follow if the silk is exposed to light and air,

The object of my present intention is to prevent the weakening of the silk weighted in this way, and I have-ascertained that by following the method now to be described this may be effectually accomplished, the silk being preserved sothat its strength remains substantially unimpaired by theweighting process.

A one (1) per cent. solution of a hydrazin salt, preferably hydrazin acetate, is first prepared. With this solution the silk, already weighted and dyed, or at least weighted, is treated, being thoroughly impregnated with the same. The-silk is then dried by whizzing it in a centrifugal Specification of Letters Patent.

Patented Jan. 14. 1913.

Application filed May 18, 1911. Serial 1 v 627,996.

machine or whiz, or. otherwise, whereupon it will be-found not only to possess substantially its original strength but to retain it, so that after a suflicient time shall have passed to bring about the decay of silk untreated by my method the silk so treated will be substantially as strong as it was when it emerged from the treatment.

-Having thus fully described my invention what I claim is: I Y

1. The herein described method .of preserving tin weighted silk which consists in treating the same with a solution of a member of the hydrazin group, substantially as described. v 1

. 2. The herein described method of preserving tin weighted silk which consists in treating the same with a solution of hydrazin salt, substantially as described.

'3. Tl1e herein described method of preserving tin weighted silk which consists in t-reating'thesame with a solution of hydrazin acetate, substantially as described.

In testimony whereof I affiX my signature in presence of two witnesses.

Witnesses:

JOHN W. STEWARD, WM. D. BELL.

Copies of this patent may be obtained for fiv'e cent; each, by addressing the Commissioner of ZPatents.

Washington, D. C.

ERNEST MEILI. v a 

